package com.woniu.woniuproject.utils;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.woniu.woniuproject.config.AlipayConfig;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


public class AlipayUtil {
/**
 * 
 * @param outTradeNo 订单号
 * @param totalAmount  付款金额
 * @param tradeName   订单名称
 * @param tradeDescript  商品描述
 * @param req
 * @param resp
 * @throws ServletException
 * @throws IOException
 */
	public  static void getAlipayClient(String outTradeNo,String totalAmount,HttpServletRequest req,HttpServletResponse resp) throws ServletException, IOException{
		//获得初始化的AlipayClient
	    AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
	  //设置请求参数
	    AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
	    alipayRequest.setReturnUrl(AlipayConfig.return_url);
	    alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
	    //商户订单号，商户网站订单系统中唯一订单号，必填
	    String out_trade_no =outTradeNo;
	    //付款金额，必填
	    String total_amount =totalAmount;
	    //订单名称，必填
	    String subject ="商城";
	    //商品描述，可空
	    String body ="假冒商品";

	    alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\"," 
	            + "\"total_amount\":\""+ total_amount +"\"," 
	            + "\"subject\":\""+ subject +"\"," 
	            + "\"body\":\""+ body +"\"," 
	            + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

	    //请求
	    String result;
		try {
			result = alipayClient.pageExecute(alipayRequest).getBody();
			resp.setContentType("text/html;charset=" + AlipayConfig.charset);
			resp.getWriter().write(result);//直接将完整的表单html输出到页面
			resp.getWriter().flush();
			resp.getWriter().close();
		} catch (AlipayApiException e) {
			e.printStackTrace();
			resp.getWriter().write("捕获异常出错");
			resp.getWriter().flush();
			resp.getWriter().close();
		}
		
    }
	}
	
